Ensure mounting of udf filesystems is disabled

LowLevel 2Manual reviewcos

Description

The udf filesystem type is the universal disk format used to implement ISO/IEC 13346 and ECMA-167 specifications. This is an open vendor filesystem type for data storage on a broad range of media. This filesystem type is necessary to support writing DVDs and newer optical disc formats. Removing support for unneeded filesystem types reduces the local attack surface of the system. If this filesystem type is not needed, disable it.

How it is checked

Audit method: Manual review

This recommendation cannot be checked automatically. A scan lists it with these instructions when you pass --include-manual.

Run the following commands and verify the output is as indicated: # modprobe -n -v udf install /bin/true # lsmod | grep udf <No output>

How it is fixed

Fix method: Guidance or infrastructure patch

Edit or create a file in the /etc/modprobe.d/ directory ending in .conf Example: vim /etc/modprobe.d/udf.conf and add the following line: install udf /bin/true Run the following command to unload the udf module: # rmmod udf

Properties

Operating systems: Any
Tags: container-optimized-oscos
Reference: CIS Google Container-Optimized OS Benchmark v1.2.0 - 1.1.1.1 Ensure mounting of udf filesystems is disabled